SIST EN 12326-1:2004
(Main)Slate and stone products for discontinuous roofing and cladding - Part 1: Product specification
Slate and stone products for discontinuous roofing and cladding - Part 1: Product specification
TThis European Standard specifies requirements for slate and stone products for roofing and external cladding, as defined in 3.1, 3.2 and 3.3, used for assembly into discontinuous roofing and external cladding (except bonded cladding).
This European Standard does not apply to products for roofing or external cladding made from the following:
a) stone other than those defined in 3.1, 3.2 and 3.3;
b) concrete;
c) polymeric materials;
d) fibre reinforced cement;
e) metal;
f) clay.
This European Standard is not applicable to roofing and cladding slates used internally.
NOTE 1 Requirements for internal wall lining slate are specified in prEN 1469.
This European Standard is not applicable to bonded cladding (cladding fixed with adhesives).
For the purposes of this European Standard, slates for roofing and external cladding have been classified according to the product type and the stone from which they are made.
This European Standard does not include requirements for appearance.
NOTE 2 Some general guidance for appearance is given in annex A.
Schiefer und andere Natursteinprodukte für überlappende Dachdeckungen und Außenwandbekleidungen - Teil 1: Produktspezifikation
Dieses Dokument legt Anforderungen an Schiefer und andere Natursteinprodukte für Dachdeckungen und Außenwandverkleidungen, die in 3.1, 3.2 und 3.3 definiert sind, für die Verwendung in überlappenden Verlegungen und Außenwandbekleidungen (mit Ausnahme von geklebten Bekleidungen) fest.
Dieses Dokument gilt nicht für Produkte für Dachdeckungen oder Außenwandbekleidungen aus den folgenden Baustoffen:
a) Gesteine außerhalb der Definitionen in 3.1, 3.2 und 3.3;
b) Beton;
c) Polymerwerkstoffe;
d) Faserzement;
e) Metall;
f) Ton.
Dieses Dokument gilt nicht für Dach- und Wandschiefer für die Verwendung in Innenräumen.
ANMERKUNG 1 Anforderungen an Schiefer für Innenwände sind in prEN 1469 festgelegt.
Dieses Dokument gilt nicht für geklebte Bekleidungen (mit Klebstoff befestigte Bekleidungen).
Für die Anwendung dieser Europäischen Norm wurden Dach- und Außenwandbekleidungen nach der Produktart und dem Gestein, aus dem sie hergestellt wurden, klassifiziert.
Dieses Dokument enthält keine Anforderungen an das Aussehen.
ANMERKUNG 2 Einige allgemeine Leitlinien zum Aussehen sind in Anhang A angegeben.
Ardoises et éléments en pierre pour toiture et bardage pour pose en discontinu - Partie 1: Spécifications produit
Le présent document spécifie les exigences relatives aux ardoises et éléments en pierre pour toiture et bardage des bâtiments, telles que définies au 3.1, 3.2 et 3.3, utilisées pour la toiture et le bardage pour pose en discontinu (hors bardage renforcé).
Il ne s'applique pas aux produits de toiture ou de bardage fabriqués dans les matériaux suivants :
a) les pierres autres que celles définies au 3.1, 3.2 et 3.3 ;
b) le béton ;
c) les matériaux polymeres ;
d) le ciment renforcé par des fibres ;
e) le métal ;
f) l'argile.
Le présent document n'est pas applicable aux ardoises pour la toiture et le bardage en intérieur.
NOTE 1 Les prescriptions relatives aux ardoises utilisées en revetement mural sont spécifiées dans le prEN 1469.
Le présent document n'est pas applicable au bardage renforcé (bardage fixé par des adhésifs).
Pour les besoins du présent document, les ardoises de toiture et de bardage ont été classées selon le type de produit et la pierre dans laquelle elles sont extraites.
Le présent document ne comprend pas de prescriptions relatives a l'aspect.
NOTE 2 Des informations générales sur l'aspect des ardoises figurent a l'Annexe A.
Skrilavec in drugi izdelki iz naravnega kamna za polaganje streh in zidov - 1. del: Specifikacije proizvoda
General Information
Relations
Standards Content (Sample)
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Slate and stone products for discontinuous roofing and cladding - Part 1: Product specificationSkrilavec in drugi izdelki iz naravnega kamna za polaganje streh in zidov - 1. del: Specifikacije proizvodaArdoises et éléments en pierre pour toiture et bardage pour pose en discontinu - Partie 1: Spécifications produitSchiefer und andere Natursteinprodukte für überlappende Dachdeckungen und Außenwandbekleidungen - Teil 1: Produktspezifikation91.100.15Mineralni materiali in izdelkiMineral materials and productsICS:SIST EN 12326-1:2004enTa slovenski standard je istoveten z:EN 12326-1:200401-december-2004SIST EN 12326-1:2004SLOVENSKI
STANDARD
EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 12326-1July 2004ICS 91.100.15English versionSlate and stone products for discontinuous roofing and cladding- Part 1: Product specificationArdoises et éléments en pierre pour toiture et bardage pourpose en discontinu - Partie 1: Spécifications produitSchiefer und andere Natursteinprodukte für überlappendeDachdeckungen und Außenwandbekleidungen - Teil 1:ProduktspezifikationThis European Standard was approved by CEN on 23 April 2004.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such nationalstandards may be obtained on application to the Central Secretariat or to any CEN member.This European Standard exists in three official versions (English, French, German). A version in any other language made by translationunder the responsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as the officialversions.CEN members are the national standards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France,Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia,Slovenia, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMITÉ EUROPÉEN DE NORMALISATIONEUROPÄISCHES KOMITEE FÜR NORMUNGManagement Centre: rue de Stassart, 36
B-1050 Brussels© 2004 CENAll rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 12326-1:2004: E
EN 12326-1:2004 (E) 2 Contents page Foreword.3 Introduction.4 1 Scope.5 2 Normative references.5 3 Terms and definitions.5 4 Symbols and abbreviations.7 5 Requirements.8 5.1 Origin and petrography.8 5.2 Thickness.8 5.3 Bending strength.11 5.4 Grain.11 5.5 Water absorption.11 5.6 Freeze–thaw resistance (only for code A2 from Table 2).12 5.7 Thermal cycle test.12 5.8 Carbonate content.12 5.9 Sulfur dioxide exposure test.13 5.10 Non-carbonate carbon content.14 5.11 Defects.14 5.12 Dimensions.14 5.13 Fire.16 5.14 Release of dangerous substances.16 5.15 Number of slates required for type tests and factory production control.17 6 Evaluation of conformity.17 6.1 General.17 6.2 Testing frequency.17 6.3 Type tests.19 6.4 Factory production control.19 6.5 Procedures in case of nonconformity and/or complaint.20 7 Marking, labelling and packaging.21 Annex A (informative)
Appearance of slates.23 Annex B (informative)
Calculation of the basic individual thickness of slates.24 Annex C (informative)
General guidance on the installation of slates.26 Annex D (informative)
Accompanying commercial document.27 Annex ZA (informative)
Clauses of this European Standard addressing the provisions of the EU Construction Products Directive.31 Bibliography.36
EN 12326-1:2004 (E) 3 Foreword This document (EN 12326-1:2004) has been prepared by Technical Committee CEN/TC 128 “Roof covering products for discontinuous laying and products for wall cladding”, the secretariat of which is held by IBN. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by January 2005, and conflicting national standards shall be withdrawn at the latest by January 2005. This document has been prepared under a mandate given to CEN by the European Commission and the European Free Trade Association, and supports essential requirements of EU Directive(s). For relationship with EU Directive(s), see informative Annex ZA, which is an integral part of this document.
This document includes a Bibliography. This European Standard EN 12326-1 is one of a series of product standards for building materials. It is published in two parts as follows:
Part 1: Product specification
Part 2: Methods of test No existing European Standard is superseded. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.
EN 12326-1:2004 (E) 4 Introduction The evaluation of the performance of the products has been defined, as far as possible, in terms of a number of type tests.
A distinction has been made between product appraisal (type test) and routine factory production control requirements. The performance of a roof or wall constructed with these products depends not only on the properties of the product as required by this document, but also on the design, construction and performance of the roof or wall as a whole in relation to the environment and conditions of use.
EN 12326-1:2004 (E) 5 1 Scope This document specifies requirements for slate and stone products for roofing and external cladding, as defined in 3.1, 3.2 and 3.3, used for assembly into discontinuous roofing and external cladding (except bonded cladding). This document does not apply to products for roofing or external cladding made from the following: a) stone other than those defined in 3.1, 3.2 and 3.3; b) concrete; c) polymeric materials; d) fibre reinforced cement; e) metal; f) clay. This document is not applicable to roofing and cladding slates used internally. NOTE 1 Requirements for internal wall lining slate are specified in prEN 1469. This document is not applicable to bonded cladding (cladding fixed with adhesives). For the purposes of this document, slates for roofing and external cladding have been classified according to the product type and the stone from which they are made. This document does not include requirements for appearance. NOTE 2 Some general guidance for appearance is given in Annex A. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
EN 12326-2:2000, Slate and stone products for discontinuous roofing and cladding — Part 2: Methods of test. EN ISO 9001, Quality management systems - Requirements (ISO 9001:2000). ISO 2859-1:1999, Sampling procedures for inspection by attributes — Part 1: Sampling schemes indexed by acceptance quality limit (AQL) for lot-by-lot inspection. 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1
slate (commercial definition)
rock which is easily split into thin sheets along a plane of cleavage resulting from a schistosity flux caused by very low or low grade metamorphism due to tectonic compression NOTE 1 It is distinguished from sedimentary (stone) slate, which invariably splits along a bedding or sedimentation plane.
EN 12326-1:2004 (E) 6 NOTE 2 Slate originates from clayey sedimentary rocks and belongs petrographically to a range which begins at the boundary between sedimentary and metamorphic formations and ends at the epizonal-metamorphic phyllite formations. 3.2 roofing slate
rock used for roofing and external cladding, in which phyllosilicates are the predominant and most important components and exhibiting a prominent slatey cleavage
3.3
roofing carbonate slate
rock used for roofing and external cladding, containing phyllosilicates and a minimum carbonate content of 20 % and exhibiting a prominent slatey cleavage
3.4
vein
separately identifiable band of slate rock within the geological formation of a quarry or mine 3.5
vein
(in a roofing or external cladding slate), localized occurrence, usually passing through the thickness of a slate, of minerals that have intruded or infiltrated into a joint or fissure in the parent rock 3.6
grain
orientation of the minerals in slate which results in an anisotropic bending strength NOTE In the bending strength test, grain is perpendicular to the load bar in the test that usually gives the highest failure result. 3.7
Student's t-test
standard parametric statistical test used to test hypotheses about population means when the variance(s) are known NOTE 1 See ISO 3534-1. NOTE 2 In this document, the Student's t-test is used to test for significant differences between the means of two populations. 3.8 rectangular slate
slate which is square or rectangular including such slates which have been shouldered 3.9 shouldering
removal of the upper corners of a roofing or external cladding slate to facilitate laying
NOTE This description does not apply to special designs of slates. 3.10
shouldered slate
slate from which the upper corners have been removed 3.11
type test
product appraisal test concerned with one or more of the following, the effect of which cannot be anticipated on the basis of previous tests: — the operation of a new quarry, mine or vein of slate for the first time; — an unanticipated change in the geology of the rock
EN 12326-1:2004 (E) 7 3.12
factory production control test
test performed on samples drawn from continuous production to establish whether a lot conforms to this document 3.13
nominal thickness
thickness of slates declared by the manufacturer 3.14
packed thickness
thickness of 100 packed slates divided by 100 and reduced by a factor depending on the type of slate measured NOTE See EN 12326-2:2000, Table 2 and 8.1. 3.15
basic individual thickness
thickness of slates determined from the modulus of rupture, as shown in Annex B, and/or from traditional construction methods NOTE
See informative Annex B and informative Annex C. 3.16
minimum individual thickness
minimum thickness of slates determined by adjusting the basic individual thickness in accordance with 5.2.3 3.17
modulus of rupture
maximum stress sustained by a slate test piece when a bending moment is applied NOTE In this document, the arrangement of the test is three point bending. 3.18
random slates
slates or sets of slates produced to undefined dimensions 4 Symbols and abbreviations AQL acceptable quality level A1, A2 codes applied to the result of the water absorption test b width of a slate, in millimetres
ebi basic individual thickness of roofing slates determined from the modulus of rupture and/or traditional construction methods, in millimetres ei individual thickness of roofing slates, in millimetres el thickness of a slate calculated as a function of its longitudinal modulus of rupture and the X factor, in millimetres emi minimum thickness of individual slates, in millimetres ep the thickness of packed slates, in millimetres es depth of softening in the sulfur dioxide exposure test for slates with a carbonate content greater than or equal to 20 %, in millimetres
EN 12326-1:2004 (E) 8 et thickness of a slate calculated as a function of its transverse modulus of rupture and the X factor, in millimetres l length, in millimetres Rcl characteristic longitudinal modulus of rupture, in megapascals Rct characteristic transverse modulus of rupture, in megapascals S1, S2, S3 codes applied to the result of the sulfur dioxide exposure test for slates with a carbonate content of less than 20 % S-3 inspection level defined in ISO 2859-1 T1, T2, T3 codes applied to the result of the thermal cycle test X nationally designated constant determined as a function of climate and/or construction techniques, in root newtons.root millimetres (N1/2.mm1/2) 5 Requirements 5.1 Origin and petrography A petrographic examination as specified in EN 12326-2:2000, Clause 17, shall be carried out for identification purposes and to decide whether the product falls within the scope of this document. Every slate in a consignment shall be supplied from the declared source quarry, mine or vein of slate and shall be of the declared slate type as defined in 3.2 or 3.3. 5.2 Thickness 5.2.1 General A flow chart for the control of nominal and individual thickness of slates is given in Figure 1. 5.2.2 Nominal thickness Manufacturers shall declare the nominal thickness of each roofing slate product in millimetres, and the amount by which the individual thickness varies as a percentage of the nominal thickness. 5.2.3 Individual thickness 5.2.3.1 The measurement of individual thickness shall be carried out in accordance with 8.2 of EN 12326-2:2000. The individual thickness of the slates shall not be less than 2,0 mm. 5.2.3.2 The minimum individual thickness of slates (emi) shall be determined as a function of their mechanical resistance — the bending strength and modulus of rupture (determined in accordance with EN 12326-2:2000, Clause 10) — and the climatic conditions or the traditional construction techniques in the country of use, increased by the appropriate value given in 5.2.3.3, 5.2.3.4 and/or 5.2.3.5. The minimum individual thickness shall be the largest value determined using any of the above factors. NOTE 1 The mechanical resistance of a slate is a function of both the inherent strength of the rock from which it is made and its thickness. Annex B of this document provides a method of calculating the basic individual thickness (ebi). NOTE 2 The usual construction techniques can be given in national regulations or national standards for execution. A list of documents is given in Annex C. NOTE 3 Member States can explain their national rules used to determine the minimum thickness of slates in an informative national annex.
EN 12326-1:2004 (E) 9 5.2.3.3 The increase in the basic individual thickness of slates (ebi) with a carbonate content equal to or less than 20 % (determined in accordance with EN 12326-2:2000, Clause 14) shall not be less than the appropriate value shown in Table 1 for the relevant sulfur dioxide exposure code S1 or S2 in 5.9.1 (as determined in accordance with EN 12326-2:2000, 15.1). 5.2.3.4 Slates with a carbonate content equal to or less than 20 %, (determined in accordance with EN 12326-2:2000, Clause 14) and achieving a sulfur dioxide exposure code S3 in 5.9.1 (determined in accordance with EN 12362-2:2000, 15.1) shall have a minimum individual thickness of not less than 8,0 mm or the thickness determined in accordance with EN 12326-2:2000, 15.2, and 5.2.3.5 of this document. 5.2.3.5 The increase in basic individual thickness of slates (ebi) with a carbonate content greater than 20 % (determined in accordance with EN 12326-2:2000, Clause 14) or of slates achieving a sulfur dioxide exposure code S3 (determined in accordance with EN 12326-2:2000, 15.1) shall not be less than the value obtained using the following equation: )7(5,02sbimieee++= where emi
is the minimum individual thickness, in millimetres; ebi
is the basic individual thickness, in millimetres (see Annex B); es
is the thickness of the softened layer, in millimetres.
EN 12326-1:2004 (E) 10
Figure 1 — Flow chart for the control of the nominal and individual thickness of slates
EN 12326-1:2004 (E) 11 Table 1 — Minimum individual thickness of slates in relation to carbonate content and sulfur dioxide exposure code Carbonate content
% Sulfur dioxide exposure code determined in accordance with EN 12326-2:2000, 15.1 Depth of softened layer es determined in accordance with EN 12326-2:2000, 15.2 mm Thickness adjustment S1 — None S2 — ebi + 5 % ≤5,0 S3 — ebi
≥ 8,0 mm or switch to the test in 15.2 of EN 12326-2:2000 S1 — ebi
+ 5 % S2 — ebi
+ 10 % > 5,0 ≤ 20,0 S3 — ebi
≥ 8,0 mm or switch to the test in 15.2 of EN 12326-2:2000 0 to 0,70 ebi
+ 0,50 + (7.es2) > 20,0 — > 0,70 Not suitable for roofing or external cladding slates Key —:
Not applicable.
5.2.3.6 The variation of individual thickness shall be within the declared range, which shall not be greater than ± 35 % of the nominal thickness. 5.2.4 Packed thickness 5.2.4.1 The packed thickness of 100 slates shall be determined according to EN 12326-2:2000, 8.1. 5.2.4.2 The packed thickness of 100 slates shall not deviate by more than ± 15 % of the nominal thickness. 5.3 Bending strength The mean failure load and the characteristic modulus of rupture, determined in accordance with EN 12326-2:2000, Clause 10 for each nominal thickness of product, shall be declared by the manufacturer. 5.4 Grain If the characteristic modulus of rupture determined in accordance with EN 12326-2:2000, Clause 10, indicates different bending strengths in the longitudinal and transverse orientations, the direction of the largest value shall be declared by the manufacturer. NOTE Grain is not always visible to the naked eye. In this case, petrographic analysis can be used to determine grain orientation. 5.5 Water absorption When tested in accordance with EN 12326-2:2000, Clause 11, slates shall conform to code A1 or A2 from Table 2.
EN 12326-1:2004 (E) 12 Table 2 — Water absorption requirements Code Water absorption % Requirement A1 ≤ 0,6 Acceptable A2 > 0,6 Shall conform to 5.6
5.6 Freeze–thaw resistance (only for code A2 from Table 2) When tested in accordance with EN 12326-2:2000, Clause 12, slates shall show no significant reduction in bending strength using a one-sided Student's t-test at a 2,5 % significance level. If the sample mean modulus of rupture after the freeze–thaw cycling is equal to or greater than the value before the freeze–thaw cycling, the t-test shall not be carried out. 5.7 Thermal cycle test When tested in accordance with EN 12326-2:2000, Clause 12, slates shall conform to the relevant part of Table 3 as declared by the manufacturer. Table 3 — Thermal cycle requirements Code Observation in test No changes in appearance Surface oxidation of metallic minerals T1 Colour changes that neither affect the structure nor form runs of discolouration T2 Oxidation or appearance changes of the metallic inclusions with runs of discolouration but without structural changes T3 Oxidation or appearance changes of metallic minerals that penetrate the slate and risk forming holes It shall not be acceptable for slates to exhibit exfoliation, splitting or other major structural changes. NOTE
Slates within code T3, which potentially may result in water penetration, should only be used selectively with suitable methods of construction which avoid such penetration (see annex C).
5.8 Carbonate content The carbonate content determined in accordance with EN 12326-2:2000, Clause 14, shall conform to the manufacturer's stated value.
EN 12326-1:2004 (E) 13 5.9 Sulfur dioxide exposure test 5.9.1 Slates with a carbonate content of ≤ 20 % determined in accordance with EN 12326-2:2000, Clause 14, shall be tested according to EN 12326-2:2000, 15.1, and shall be allocated a code as shown in Figure 2 depending upon the assessment criteria reported in the test. Slates shall conform to the relevant part of Table 4 as declared by the manufacturer. Any slates which achieve a code S3 may be tested according to EN 12326-2:2000, 15.2, to determine their minimum individual thickness according to 5.2.3.5.
EN 12326-1:2004 (E) 14
Figure 2 — Coding for sulfur dioxide exposure test Table 4 — Sulfur dioxide exposure test requirements Test code Compliance criteria S1 Acceptable in all conditions S2 Acceptable, subject to 5.2.3.3 and Table 1 S3 Acceptable, subject to 5.2.3.4, 5.2.3.5 and Table 1
5.9.2 Slates with a carbonate content of > 20 % determined in accordance with EN 12326-2:2000, Clause 14, shall be tested according to EN 12326-2:2000, 15.2. The depth of softening measured (es) shall be used to determine the minimum individual thickness according to 5.2.3.5. 5.10 Non-carbonate carbon content When tested in accordance with EN 12326-2:2000, 8.2, the non-carbonate carbon content of slates shall be equal to or less than 2 %. 5.11 Defects When subjected to a macroscopic examination according to EN 12326-2:2000, 17.6.1, slates shall be free of physical or petrographic features, as listed in EN 12326-2:2000, 17.6.1b) and c), and damage which would be detrimental to their performance. NOTE Small cracks and loosely attached flakes that are the result of the method of manufacture are permissible in so far as they do not prejudice the other requirements of this document. 5.12 Dimensions 5.12.1 General Requirements for rectangular slates, including shouldered rectangular roofing and external cladding slates, are specified in 5.12.2 to 5.12.5. Requirements for roofing and external cladding slates of other shapes or undefined dimensions are specified in 5.12.6.
EN 12326-1:2004 (E) 15 5.12.2 Deviation of length and width When tested in accordance with EN 12326-2:2000, Clause 5, rectangular slates shall not deviate from the manufacturer's declared length or width by more than ± 5 mm. 5.12.3 Deviation from edge straightness When tested in accordance with EN 12326-2:2000, Clause 6, the deviation from straightness of either of the long edges of rectangular slates shall not exceed the following limits (see Figure 3): a) for slates less than or equal to 500 mm in length, the deviation shall not exceed 5 mm; b) for slates greater than 500 mm in length, the deviation shall not exceed 1 % of the length. 5.12.4 Deviation from rectangularity When tested in accordance with EN 12326-2:2000, Clause 7, rectangular slates which have not been shouldered shall not deviate from rectangularity in any corner by more than ± 1 % of their length (see Figure 3). NOTE Shouldering of slates is permitted provided it does not adversely affect the performance of the roof with respect to wind uplift resistance and driving rain. Further guidance on shouldering can be found in the reference documents listed in Annex C of this document.
Figure 3 — Deviations from straightness of edges and rectangularity 5.12.5 Deviation from flatness When tested in accordance with EN 12326-2:2000, Clause 9, rectangular slates for normal use shall not deviate from flatness by more than the percentage shown in Table 5. Key 1 Maximum deviation of an edge: see 5.12.3 2 Maximum deviation from a rectangle: see 5.12.4
EN 12326-1:2004 (E) 16 Table 5 — Maximum deviation from flatness for rectangular slates Slate typea
Maximum deviation as a percentage of the length Very smooth < 0,9 Smooth < 1,0 Normal < 1,5 Textured < 2,0 Slates for special situations No limitb
a As specified by the manufacturer. b Slates for which there is no limit on the deviation from flatness are only suitable for use in special situations such as curved slating.
Curved slates shall be manufactured so that the bevelled edges are applied to the convex face of the slate. 5.12.6 Format of random slates and special shaped slates 5.12.6.1 The format of slates that are manufactured to shapes other than rectangular as defined in 3.8, shall be declared by the manufacturer. 5.12.6.2 Slates made to formats with undefined dimensions, except for the limitation on individual thickness in 5.2.3.1 (not less than 2,0 mm), shall be so designated in the accompanying commercial document which accompanies a consignment of slates (see Clause 6). NOTE 1 Examples of such slates are random slates (UK) and schupen slates (Germany). NOTE 2 An example format for an accompanying commercial document is contained in Annex D. 5.12.6.3 The requirements of 5.12.2 to 5.12.5 shall not apply to slates made to undefined dimensions or non-rectangular formats. 5.13 Fire 5.13.1 External fire performance Where subject to regulatory requirements, the external fire performance shall be declared. Products covered by this document are "deemed to satisfy without the need for testing" in relation to the requirements for external fire performance, i.e. they meet the definitions given in Commission Decision 2000/553/EC. 5.13.2 Reaction to fire performance Where subject to regulatory requirements, the reaction to fire of slate and stone products shall be declared according to the following provisions. Roofing and external cladding slates are considered to satisfy the requirements for the characteristic of reaction to fire performance Class A1 without the need for testing, i.e. they satisfy the provisions of EC Decision 96/603/EC, as amended. 5.14 Release of dangerous substances Where subject to regulatory requirements, the release of dangerous substances shall be declared. For products sold within the European Economic Area, see Annex ZA.
EN 12326-1:2004 (E) 17 5.15 Number of slates required for type tests and factory production control Table 6 lists the testing requirements and the number of slates required for each test. Table 6 — Testing requirements and number of slates required for type tests and factory production control Characteristics Clause in EN 12326-2:2000 Number of slates for one test Rock properties 10: Failure load in bending and grain 20 or 40a
8.2: Individual thickness 1 Thickness 8.1: Packed thickness 100 11: Water absorption 5 12: Freeze thaw 20 or 40a 16: Thermal cycle 6 14: Carbonate content 3 15.1: SO2 exposure ≤ 20 % CaCO3 6 15.2: SO2 exposure > 20 % CaCO3 6 or 12a Rock properties 13: Carbon content 3 Identification, scope and defects
17: Petrography 1 5: Length & width 1 6: Ed
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